Improvement in dental pluggers



W. H. DIBBL'E. Dental-Hugger.

No. 211,652. Patented 1an. 28,1879.

UNITED STATESl PATENT EEIo fi lMPRovEMENT IN DENTAL PLUGGERSV,

Specification forming part of Letters Patent No. 211,652, dated January 28, 1879; application lcd November 4, 1878. v

My invention relates to an instrument autol matically operated by alternate pressure and exhaustion of air within a cylinder, so as to strike a succession of blows with a weight 0r hammer upon the end of the tool by which metallic foil is compressed and driven into the cavity of a tooth.

Similar instruments have heretofore been made upon which my present invention is an improvement. Such instruments have either had the plugging-tool inserted in a sliding head or socket, upon which the blow' was struck by the hammer, usually controlled by an interposed spring, or have had the tool tirmly set in the end of the cylinder itself, so that the wholemoved together. The hammer has also been iliade of solid metal.v

The object ofmyinvention is to give a lighter and more readily graduated blow when desired, and to strike directly upon the tool without any intermediate parts, and it consists in the mechanism hereinafter described.'

In the accompanying drawings, Figure-l is a longitudinal section through my improved implement. Fig. 2 is an enlarged section of the part more especially embodying my improvements. Fig. 3 is an end view of the hammer. Fig. 4 is a top view ot' the part into which the end of the tool is inserted.

A is a hollow cylinder. At its upper end, as shown in the drawing, it has the cap B, furnished Awith an opening, communicating by Vmeans of a flexible pipe, C, with any suitable -apparatus or pump, for 'alternately injecting and withdrawing the air. At the opposite end is the cap I), forming a socket for the tool E, in which it can slide freely.

F is the hammer, operating in the customary manner back and forth in the cylinder A. It has a socket in its end, into which is inserted lthe rubber packing G, vwhere the hammer comes in contact with, the head of the tool This tool extends wit-hin the cylinder, and is struck directlyT by the hammer.

H is a button or washer, forming anut, into which the end of the tool is screwed, and above which it slightly projects.

I and I are screws or pins fastened into the cap I), and passing through holes in the button II, for preventing it from turning when the tool is screwed in or removed. Under this button, between it and the cap D, is the elastic washer J, for permittinga slight movement ofthe tool, when struck by the hammer, inde pendent ofthe shell A B D.

By means of my improved construction a very much better and more easily-graduated blow can be given to the tool than when it is insertedin a heavy sliding socket or attached directl yto the end of the cylinder. The elastic packing in the end ot' the hammer also op;- erates directly upon the end of' the tool, and gives a more elastic blow, without the sharp jar usually experienced, and is far less disagreeable to the person operated upon. The

whole implement can also be made much lighter and more easily handled NVhat I claim as my invention is The combination ot' the button H, through which the end of the tool E is screwed, the pinsI I, and the elastic cushion J, arranged for holding the tool in a dental plugger, substantially as herein described.

WILLIAM H. DIBBLE. Witnesses:

S. A. ROBINSON, SYLvEsTER EAsToN. 

